Stability Analysis in Large Aspect Ratio Tokamaks: Current Finite Relaxation due to Electrons Inertia

• Grant number: 17/20192-2
• Support type: Regular Research Grants
• Duration: March 01, 2018 - February 29, 2020
• Field of knowledge: Physical Sciences and Mathematics - Physics - Physics of Fluids, Plasma Physics and Electrical Discharge
• Principal researcher: Francisco Eugenio Mendonça da Silveira
• Grantee: Francisco Eugenio Mendonça da Silveira
• Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil

Abstract

The main aim of this working plan is to investigate the influence of the electron inertia on MHD instabilities, in the physics of large aspect ratio tokamaks. Inertial effects are introduced from the consideration of a finite penetration depth for the electron. In this case, the current density acquires an also finite relaxation time. The state of stationary equilibrium of the system, in the cylindrical approximation, is briefly revised, and the importance of the investigation to the physics of Z-pinches, emphasized. Preliminary results, in the domain of ideal unidimensional MHD, in the adiabatic approximation, are presented, and extensions to dissipative three dimensional MHD, including the contextualization of the model in the realm of the energy principle, addressed. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SILVEIRA, F. E. M.; BENETTI, M. H. Towards a physical interpretation of the deformation parametrization in nonextensive statistics Evidence for a generalization of the number of degrees of freedom in a nonextensive gas of charged particles. EUROPEAN PHYSICAL JOURNAL PLUS, v. 136, n. 12 DEC 6 2021. Web of Science Citations: 0.

SILVEIRA, FRANCISCO E. M.; BENETTI, MONA HEGEL; CALDAS, IBERE LUIZ. Equation of State of the Kappa-Distributed Solar Wind Particles in the Earth's Magnetopause. SOLAR PHYSICS, v. 296, n. 7 JUL 2021. Web of Science Citations: 0.

SILVEIRA, F. E. M.; CAMARGO, R. S.; CALDAS, I. L. Concentration discontinuity of alkalies at high pressures. Physics Letters A, v. 395, APR 16 2021. Web of Science Citations: 0.

SILVEIRA, F. E. M.; SIQUEIRA, B. P. Electron skin depth in low density plasmas. JOURNAL OF PLASMA PHYSICS, v. 86, n. 1 FEB 2020. Web of Science Citations: 0.